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ffmpeg/libavformat/mxfdec.c
Reimar Döffinger 39bb30f664 Change all functions referenced in the mxf_metadata_read_table to use the same 
prototype and also always call them with exactly those arguments.
The previous way seems to have worked on all supported platforms, however
it was not strictly valid C and would crash e.g. with a compiler that
uses stdcall by default.
Also avoids warnings if -Wstrict-prototypes is used.

Originally committed as revision 23939 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-07-01 17:10:31 +00:00

1027 lines
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/*
* MXF demuxer.
* Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* References
* SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
* SMPTE 377M MXF File Format Specifications
* SMPTE 378M Operational Pattern 1a
* SMPTE 379M MXF Generic Container
* SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
* SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
* SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
*
* Principle
* Search for Track numbers which will identify essence element KLV packets.
* Search for SourcePackage which define tracks which contains Track numbers.
* Material Package contains tracks with reference to SourcePackage tracks.
* Search for Descriptors (Picture, Sound) which contains codec info and parameters.
* Assign Descriptors to correct Tracks.
*
* Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
* Metadata parsing resolves Strong References to objects.
*
* Simple demuxer, only OP1A supported and some files might not work at all.
* Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
*/
//#define DEBUG
#include "libavutil/aes.h"
#include "libavcodec/bytestream.h"
#include "avformat.h"
#include "mxf.h"
typedef struct {
UID uid;
enum MXFMetadataSetType type;
UID source_container_ul;
} MXFCryptoContext;
typedef struct {
UID uid;
enum MXFMetadataSetType type;
UID source_package_uid;
UID data_definition_ul;
int64_t duration;
int64_t start_position;
int source_track_id;
} MXFStructuralComponent;
typedef struct {
UID uid;
enum MXFMetadataSetType type;
UID data_definition_ul;
UID *structural_components_refs;
int structural_components_count;
int64_t duration;
} MXFSequence;
typedef struct {
UID uid;
enum MXFMetadataSetType type;
MXFSequence *sequence; /* mandatory, and only one */
UID sequence_ref;
int track_id;
uint8_t track_number[4];
AVRational edit_rate;
} MXFTrack;
typedef struct {
UID uid;
enum MXFMetadataSetType type;
UID essence_container_ul;
UID essence_codec_ul;
AVRational sample_rate;
AVRational aspect_ratio;
int width;
int height;
int channels;
int bits_per_sample;
UID *sub_descriptors_refs;
int sub_descriptors_count;
int linked_track_id;
uint8_t *extradata;
int extradata_size;
enum PixelFormat pix_fmt;
} MXFDescriptor;
typedef struct {
UID uid;
enum MXFMetadataSetType type;
} MXFIndexTableSegment;
typedef struct {
UID uid;
enum MXFMetadataSetType type;
UID package_uid;
UID *tracks_refs;
int tracks_count;
MXFDescriptor *descriptor; /* only one */
UID descriptor_ref;
} MXFPackage;
typedef struct {
UID uid;
enum MXFMetadataSetType type;
} MXFMetadataSet;
typedef struct {
UID *packages_refs;
int packages_count;
MXFMetadataSet **metadata_sets;
int metadata_sets_count;
AVFormatContext *fc;
struct AVAES *aesc;
uint8_t *local_tags;
int local_tags_count;
} MXFContext;
enum MXFWrappingScheme {
Frame,
Clip,
};
typedef int MXFMetadataReadFunc(void *arg, ByteIOContext *pb, int tag, int size, UID uid);
typedef struct {
const UID key;
MXFMetadataReadFunc *read;
int ctx_size;
enum MXFMetadataSetType type;
} MXFMetadataReadTableEntry;
/* partial keys to match */
static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
/* complete keys to match */
static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
static int64_t klv_decode_ber_length(ByteIOContext *pb)
{
uint64_t size = get_byte(pb);
if (size & 0x80) { /* long form */
int bytes_num = size & 0x7f;
/* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
if (bytes_num > 8)
return -1;
size = 0;
while (bytes_num--)
size = size << 8 | get_byte(pb);
}
return size;
}
static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
{
int i, b;
for (i = 0; i < size && !url_feof(pb); i++) {
b = get_byte(pb);
if (b == key[0])
i = 0;
else if (b != key[i])
i = -1;
}
return i == size;
}
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
{
if (!mxf_read_sync(pb, mxf_klv_key, 4))
return -1;
klv->offset = url_ftell(pb) - 4;
memcpy(klv->key, mxf_klv_key, 4);
get_buffer(pb, klv->key + 4, 12);
klv->length = klv_decode_ber_length(pb);
return klv->length == -1 ? -1 : 0;
}
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
{
int i;
for (i = 0; i < s->nb_streams; i++) {
MXFTrack *track = s->streams[i]->priv_data;
/* SMPTE 379M 7.3 */
if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
return i;
}
/* return 0 if only one stream, for OP Atom files with 0 as track number */
return s->nb_streams == 1 ? 0 : -1;
}
/* XXX: use AVBitStreamFilter */
static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
{
const uint8_t *buf_ptr, *end_ptr;
uint8_t *data_ptr;
int i;
if (length > 61444) /* worst case PAL 1920 samples 8 channels */
return -1;
av_new_packet(pkt, length);
get_buffer(pb, pkt->data, length);
data_ptr = pkt->data;
end_ptr = pkt->data + length;
buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
for (; buf_ptr < end_ptr; ) {
for (i = 0; i < st->codec->channels; i++) {
uint32_t sample = bytestream_get_le32(&buf_ptr);
if (st->codec->bits_per_coded_sample == 24)
bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
else
bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
}
buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
}
pkt->size = data_ptr - pkt->data;
return 0;
}
static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
{
static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
MXFContext *mxf = s->priv_data;
ByteIOContext *pb = s->pb;
int64_t end = url_ftell(pb) + klv->length;
uint64_t size;
uint64_t orig_size;
uint64_t plaintext_size;
uint8_t ivec[16];
uint8_t tmpbuf[16];
int index;
if (!mxf->aesc && s->key && s->keylen == 16) {
mxf->aesc = av_malloc(av_aes_size);
if (!mxf->aesc)
return -1;
av_aes_init(mxf->aesc, s->key, 128, 1);
}
// crypto context
url_fskip(pb, klv_decode_ber_length(pb));
// plaintext offset
klv_decode_ber_length(pb);
plaintext_size = get_be64(pb);
// source klv key
klv_decode_ber_length(pb);
get_buffer(pb, klv->key, 16);
if (!IS_KLV_KEY(klv, mxf_essence_element_key))
return -1;
index = mxf_get_stream_index(s, klv);
if (index < 0)
return -1;
// source size
klv_decode_ber_length(pb);
orig_size = get_be64(pb);
if (orig_size < plaintext_size)
return -1;
// enc. code
size = klv_decode_ber_length(pb);
if (size < 32 || size - 32 < orig_size)
return -1;
get_buffer(pb, ivec, 16);
get_buffer(pb, tmpbuf, 16);
if (mxf->aesc)
av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
if (memcmp(tmpbuf, checkv, 16))
av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
size -= 32;
av_get_packet(pb, pkt, size);
size -= plaintext_size;
if (mxf->aesc)
av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
&pkt->data[plaintext_size], size >> 4, ivec, 1);
pkt->size = orig_size;
pkt->stream_index = index;
url_fskip(pb, end - url_ftell(pb));
return 0;
}
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
{
KLVPacket klv;
while (!url_feof(s->pb)) {
if (klv_read_packet(&klv, s->pb) < 0)
return -1;
PRINT_KEY(s, "read packet", klv.key);
dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset);
if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
int res = mxf_decrypt_triplet(s, pkt, &klv);
if (res < 0) {
av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
return -1;
}
return 0;
}
if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
int index = mxf_get_stream_index(s, &klv);
if (index < 0) {
av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
goto skip;
}
if (s->streams[index]->discard == AVDISCARD_ALL)
goto skip;
/* check for 8 channels AES3 element */
if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
return -1;
}
} else
av_get_packet(s->pb, pkt, klv.length);
pkt->stream_index = index;
pkt->pos = klv.offset;
return 0;
} else
skip:
url_fskip(s->pb, klv.length);
}
return AVERROR_EOF;
}
static int mxf_read_primer_pack(void *arg, ByteIOContext *pb, int tag, int size, UID uid)
{
MXFContext *mxf = arg;
int item_num = get_be32(pb);
int item_len = get_be32(pb);
if (item_len != 18) {
av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
return -1;
}
if (item_num > UINT_MAX / item_len)
return -1;
mxf->local_tags_count = item_num;
mxf->local_tags = av_malloc(item_num*item_len);
if (!mxf->local_tags)
return -1;
get_buffer(pb, mxf->local_tags, item_num*item_len);
return 0;
}
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
{
if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
return AVERROR(ENOMEM);
mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
if (!mxf->metadata_sets)
return -1;
mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
mxf->metadata_sets_count++;
return 0;
}
static int mxf_read_cryptographic_context(void *arg, ByteIOContext *pb, int tag, int size, UID uid)
{
MXFCryptoContext *cryptocontext = arg;
if (size != 16)
return -1;
if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
get_buffer(pb, cryptocontext->source_container_ul, 16);
return 0;
}
static int mxf_read_content_storage(void *arg, ByteIOContext *pb, int tag, int size, UID uid)
{
MXFContext *mxf = arg;
switch (tag) {
case 0x1901:
mxf->packages_count = get_be32(pb);
if (mxf->packages_count >= UINT_MAX / sizeof(UID))
return -1;
mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
if (!mxf->packages_refs)
return -1;
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
break;
}
return 0;
}
static int mxf_read_source_clip(void *arg, ByteIOContext *pb, int tag, int size, UID uid)
{
MXFStructuralComponent *source_clip = arg;
switch(tag) {
case 0x0202:
source_clip->duration = get_be64(pb);
break;
case 0x1201:
source_clip->start_position = get_be64(pb);
break;
case 0x1101:
/* UMID, only get last 16 bytes */
url_fskip(pb, 16);
get_buffer(pb, source_clip->source_package_uid, 16);
break;
case 0x1102:
source_clip->source_track_id = get_be32(pb);
break;
}
return 0;
}
static int mxf_read_material_package(void *arg, ByteIOContext *pb, int tag, int size, UID uid)
{
MXFPackage *package = arg;
switch(tag) {
case 0x4403:
package->tracks_count = get_be32(pb);
if (package->tracks_count >= UINT_MAX / sizeof(UID))
return -1;
package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
if (!package->tracks_refs)
return -1;
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
break;
}
return 0;
}
static int mxf_read_track(void *arg, ByteIOContext *pb, int tag, int size, UID uid)
{
MXFTrack *track = arg;
switch(tag) {
case 0x4801:
track->track_id = get_be32(pb);
break;
case 0x4804:
get_buffer(pb, track->track_number, 4);
break;
case 0x4B01:
track->edit_rate.den = get_be32(pb);
track->edit_rate.num = get_be32(pb);
break;
case 0x4803:
get_buffer(pb, track->sequence_ref, 16);
break;
}
return 0;
}
static int mxf_read_sequence(void *arg, ByteIOContext *pb, int tag, int size, UID uid)
{
MXFSequence *sequence = arg;
switch(tag) {
case 0x0202:
sequence->duration = get_be64(pb);
break;
case 0x0201:
get_buffer(pb, sequence->data_definition_ul, 16);
break;
case 0x1001:
sequence->structural_components_count = get_be32(pb);
if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
return -1;
sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
if (!sequence->structural_components_refs)
return -1;
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
break;
}
return 0;
}
static int mxf_read_source_package(void *arg, ByteIOContext *pb, int tag, int size, UID uid)
{
MXFPackage *package = arg;
switch(tag) {
case 0x4403:
package->tracks_count = get_be32(pb);
if (package->tracks_count >= UINT_MAX / sizeof(UID))
return -1;
package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
if (!package->tracks_refs)
return -1;
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
break;
case 0x4401:
/* UMID, only get last 16 bytes */
url_fskip(pb, 16);
get_buffer(pb, package->package_uid, 16);
break;
case 0x4701:
get_buffer(pb, package->descriptor_ref, 16);
break;
}
return 0;
}
static int mxf_read_index_table_segment(void *arg, ByteIOContext *pb, int tag, int size, UID uid)
{
switch(tag) {
case 0x3F05: dprintf(NULL, "EditUnitByteCount %d\n", get_be32(pb)); break;
case 0x3F06: dprintf(NULL, "IndexSID %d\n", get_be32(pb)); break;
case 0x3F07: dprintf(NULL, "BodySID %d\n", get_be32(pb)); break;
case 0x3F0B: dprintf(NULL, "IndexEditRate %d/%d\n", get_be32(pb), get_be32(pb)); break;
case 0x3F0C: dprintf(NULL, "IndexStartPosition %lld\n", get_be64(pb)); break;
case 0x3F0D: dprintf(NULL, "IndexDuration %lld\n", get_be64(pb)); break;
}
return 0;
}
static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
{
int code, value, ofs = 0;
char layout[16] = {};
do {
code = get_byte(pb);
value = get_byte(pb);
dprintf(NULL, "pixel layout: code %#x\n", code);
if (ofs < 16) {
layout[ofs++] = code;
layout[ofs++] = value;
}
} while (code != 0); /* SMPTE 377M E.2.46 */
ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
}
static int mxf_read_generic_descriptor(void *arg, ByteIOContext *pb, int tag, int size, UID uid)
{
MXFDescriptor *descriptor = arg;
switch(tag) {
case 0x3F01:
descriptor->sub_descriptors_count = get_be32(pb);
if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
return -1;
descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
if (!descriptor->sub_descriptors_refs)
return -1;
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
break;
case 0x3004:
get_buffer(pb, descriptor->essence_container_ul, 16);
break;
case 0x3006:
descriptor->linked_track_id = get_be32(pb);
break;
case 0x3201: /* PictureEssenceCoding */
get_buffer(pb, descriptor->essence_codec_ul, 16);
break;
case 0x3203:
descriptor->width = get_be32(pb);
break;
case 0x3202:
descriptor->height = get_be32(pb);
break;
case 0x320E:
descriptor->aspect_ratio.num = get_be32(pb);
descriptor->aspect_ratio.den = get_be32(pb);
break;
case 0x3D03:
descriptor->sample_rate.num = get_be32(pb);
descriptor->sample_rate.den = get_be32(pb);
break;
case 0x3D06: /* SoundEssenceCompression */
get_buffer(pb, descriptor->essence_codec_ul, 16);
break;
case 0x3D07:
descriptor->channels = get_be32(pb);
break;
case 0x3D01:
descriptor->bits_per_sample = get_be32(pb);
break;
case 0x3401:
mxf_read_pixel_layout(pb, descriptor);
break;
default:
/* Private uid used by SONY C0023S01.mxf */
if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
descriptor->extradata = av_malloc(size);
if (!descriptor->extradata)
return -1;
descriptor->extradata_size = size;
get_buffer(pb, descriptor->extradata, size);
}
break;
}
return 0;
}
/*
* Match an uid independently of the version byte and up to len common bytes
* Returns: boolean
*/
static int mxf_match_uid(const UID key, const UID uid, int len)
{
int i;
for (i = 0; i < len; i++) {
if (i != 7 && key[i] != uid[i])
return 0;
}
return 1;
}
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
{
while (uls->uid[0]) {
if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
break;
uls++;
}
return uls;
}
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
{
int i;
if (!strong_ref)
return NULL;
for (i = 0; i < mxf->metadata_sets_count; i++) {
if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
(type == AnyType || mxf->metadata_sets[i]->type == type)) {
return mxf->metadata_sets[i];
}
}
return NULL;
}
static const MXFCodecUL mxf_essence_container_uls[] = {
// video essence container uls
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
// sound essence container uls
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
};
static int mxf_parse_structural_metadata(MXFContext *mxf)
{
MXFPackage *material_package = NULL;
MXFPackage *temp_package = NULL;
int i, j, k;
dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
/* TODO: handle multiple material packages (OP3x) */
for (i = 0; i < mxf->packages_count; i++) {
material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
if (material_package) break;
}
if (!material_package) {
av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
return -1;
}
for (i = 0; i < material_package->tracks_count; i++) {
MXFPackage *source_package = NULL;
MXFTrack *material_track = NULL;
MXFTrack *source_track = NULL;
MXFTrack *temp_track = NULL;
MXFDescriptor *descriptor = NULL;
MXFStructuralComponent *component = NULL;
UID *essence_container_ul = NULL;
const MXFCodecUL *codec_ul = NULL;
const MXFCodecUL *container_ul = NULL;
AVStream *st;
if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
continue;
}
if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
continue;
}
/* TODO: handle multiple source clips */
for (j = 0; j < material_track->sequence->structural_components_count; j++) {
/* TODO: handle timecode component */
component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
if (!component)
continue;
for (k = 0; k < mxf->packages_count; k++) {
temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
if (!temp_package)
continue;
if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
source_package = temp_package;
break;
}
}
if (!source_package) {
av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
break;
}
for (k = 0; k < source_package->tracks_count; k++) {
if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
return -1;
}
if (temp_track->track_id == component->source_track_id) {
source_track = temp_track;
break;
}
}
if (!source_track) {
av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
break;
}
}
if (!source_track)
continue;
st = av_new_stream(mxf->fc, source_track->track_id);
if (!st) {
av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
return -1;
}
st->priv_data = source_track;
st->duration = component->duration;
if (st->duration == -1)
st->duration = AV_NOPTS_VALUE;
st->start_time = component->start_position;
av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
return -1;
}
PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
st->codec->codec_type = codec_ul->id;
source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
if (source_package->descriptor) {
if (source_package->descriptor->type == MultipleDescriptor) {
for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
if (!sub_descriptor) {
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
continue;
}
if (sub_descriptor->linked_track_id == source_track->track_id) {
descriptor = sub_descriptor;
break;
}
}
} else if (source_package->descriptor->type == Descriptor)
descriptor = source_package->descriptor;
}
if (!descriptor) {
av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
continue;
}
PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
essence_container_ul = &descriptor->essence_container_ul;
/* HACK: replacing the original key with mxf_encrypted_essence_container
* is not allowed according to s429-6, try to find correct information anyway */
if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
for (k = 0; k < mxf->metadata_sets_count; k++) {
MXFMetadataSet *metadata = mxf->metadata_sets[k];
if (metadata->type == CryptoContext) {
essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
break;
}
}
}
/* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
st->codec->codec_id = codec_ul->id;
if (descriptor->extradata) {
st->codec->extradata = descriptor->extradata;
st->codec->extradata_size = descriptor->extradata_size;
}
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
if (st->codec->codec_id == CODEC_ID_NONE)
st->codec->codec_id = container_ul->id;
st->codec->width = descriptor->width;
st->codec->height = descriptor->height;
if (st->codec->codec_id == CODEC_ID_RAWVIDEO)
st->codec->pix_fmt = descriptor->pix_fmt;
st->need_parsing = AVSTREAM_PARSE_HEADERS;
} else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
if (st->codec->codec_id == CODEC_ID_NONE)
st->codec->codec_id = container_ul->id;
st->codec->channels = descriptor->channels;
st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
/* TODO: implement CODEC_ID_RAWAUDIO */
if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
if (descriptor->bits_per_sample == 24)
st->codec->codec_id = CODEC_ID_PCM_S24LE;
else if (descriptor->bits_per_sample == 32)
st->codec->codec_id = CODEC_ID_PCM_S32LE;
} else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
if (descriptor->bits_per_sample == 24)
st->codec->codec_id = CODEC_ID_PCM_S24BE;
else if (descriptor->bits_per_sample == 32)
st->codec->codec_id = CODEC_ID_PCM_S32BE;
} else if (st->codec->codec_id == CODEC_ID_MP2) {
st->need_parsing = AVSTREAM_PARSE_FULL;
}
}
if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
st->need_parsing = AVSTREAM_PARSE_FULL;
}
}
return 0;
}
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Generic Sound */
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
};
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
{
ByteIOContext *pb = mxf->fc->pb;
MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
uint64_t klv_end = url_ftell(pb) + klv->length;
if (!ctx)
return -1;
while (url_ftell(pb) + 4 < klv_end) {
int tag = get_be16(pb);
int size = get_be16(pb); /* KLV specified by 0x53 */
uint64_t next = url_ftell(pb) + size;
UID uid = {0};
dprintf(mxf->fc, "local tag %#04x size %d\n", tag, size);
if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
continue;
}
if (tag > 0x7FFF) { /* dynamic tag */
int i;
for (i = 0; i < mxf->local_tags_count; i++) {
int local_tag = AV_RB16(mxf->local_tags+i*18);
if (local_tag == tag) {
memcpy(uid, mxf->local_tags+i*18+2, 16);
dprintf(mxf->fc, "local tag %#04x\n", local_tag);
PRINT_KEY(mxf->fc, "uid", uid);
}
}
}
if (ctx_size && tag == 0x3C0A)
get_buffer(pb, ctx->uid, 16);
else if (read_child(ctx, pb, tag, size, uid) < 0)
return -1;
url_fseek(pb, next, SEEK_SET);
}
if (ctx_size) ctx->type = type;
return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
}
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
MXFContext *mxf = s->priv_data;
KLVPacket klv;
if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
return -1;
}
url_fseek(s->pb, -14, SEEK_CUR);
mxf->fc = s;
while (!url_feof(s->pb)) {
const MXFMetadataReadTableEntry *metadata;
if (klv_read_packet(&klv, s->pb) < 0)
return -1;
PRINT_KEY(s, "read header", klv.key);
dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset);
if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
/* FIXME avoid seek */
url_fseek(s->pb, klv.offset, SEEK_SET);
break;
}
for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
if (IS_KLV_KEY(klv.key, metadata->key)) {
int res;
if (klv.key[5] == 0x53) {
res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
} else
res = metadata->read(mxf, s->pb, 0, 0, NULL);
if (res < 0) {
av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
return -1;
}
break;
}
}
if (!metadata->read)
url_fskip(s->pb, klv.length);
}
return mxf_parse_structural_metadata(mxf);
}
static int mxf_read_close(AVFormatContext *s)
{
MXFContext *mxf = s->priv_data;
int i;
av_freep(&mxf->packages_refs);
for (i = 0; i < s->nb_streams; i++)
s->streams[i]->priv_data = NULL;
for (i = 0; i < mxf->metadata_sets_count; i++) {
switch (mxf->metadata_sets[i]->type) {
case MultipleDescriptor:
av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
break;
case Sequence:
av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
break;
case SourcePackage:
case MaterialPackage:
av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
break;
default:
break;
}
av_freep(&mxf->metadata_sets[i]);
}
av_freep(&mxf->metadata_sets);
av_freep(&mxf->aesc);
av_freep(&mxf->local_tags);
return 0;
}
static int mxf_probe(AVProbeData *p) {
uint8_t *bufp = p->buf;
uint8_t *end = p->buf + p->buf_size;
if (p->buf_size < sizeof(mxf_header_partition_pack_key))
return 0;
/* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
end -= sizeof(mxf_header_partition_pack_key);
for (; bufp < end; bufp++) {
if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
return AVPROBE_SCORE_MAX;
}
return 0;
}
/* rudimentary byte seek */
/* XXX: use MXF Index */
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
{
AVStream *st = s->streams[stream_index];
int64_t seconds;
if (!s->bit_rate)
return -1;
if (sample_time < 0)
sample_time = 0;
seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
av_update_cur_dts(s, st, sample_time);
return 0;
}
AVInputFormat mxf_demuxer = {
"mxf",
NULL_IF_CONFIG_SMALL("Material eXchange Format"),
sizeof(MXFContext),
mxf_probe,
mxf_read_header,
mxf_read_packet,
mxf_read_close,
mxf_read_seek,
};
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